spring上下文不加载

Question

我试图加载上下文，但是我得到了UnsatisfiedDependencyException --我不知道原因是什么，服务中提供了注释和构造函数

DataJpaRepository：

@Transactional(readOnly = true)
public interface DataJpaRepository extends JpaRepository<Visit, Long> {

    @Override
    @Transactional
    Visit save(Visit visit);

    Visit findByGuestId(long guestId);

    @Query("SELECT DISTINCT v FROM Visit v WHERE  v.date BETWEEN :from AND :to")
    List<Visit> getBetween(@Param("from") Date from, @Param("to") Date to);
}


@Repository
public class VisitRepositoryImpl implements VisitRepository {

    @Autowired
    private DataJpaRepository dataJpaRepository;


    @Override
    public Visit get(long guestId) {
        return dataJpaRepository.findByGuestId(guestId);
    }

    @Override
    public Visit save(Visit visit) {
        return dataJpaRepository.save(visit);
    }

    @Override
    public List<Visit> getAll() {
        return dataJpaRepository.findAll();
    }

    @Override
    public List<Visit> getBetween(Date from, Date to) {
        Objects.requireNonNull(from, "fromDate must not be null");
        Objects.requireNonNull(to, "toDate must not be null");
        return dataJpaRepository.getBetween(from, to);
    }
}

VisitService：

@Service
public class VisitService {

    private VisitRepositoryImpl repository;

    @Autowired
    public VisitService(VisitRepositoryImpl repository) {
        this.repository = repository;
    }

    public Visit save(Visit visit) {
        return repository.save(visit);
    }

    public List<Visit> getAll() {
        return repository.getAll();
    }

    public List<Visit> getBetween(Date from, Date to) {
        Assert.notNull(from, "fromDate must not be null");
        Assert.notNull(to, "toDate  must not be null");
        return repository.getBetween(from, to);
    }
}

我感到异常的原因是：

org.springframework.beans.factory.UnsatisfiedDependencyException:错误创建D:\JAVA\library-project\target\classes\com\java\library\service\VisitService.class:文件中定义的名称为“visitService”的bean，通过构造函数参数0表示不满意的依赖关系；嵌套的异常是org.springframework.beans.factory.NoSuchBeanDefinitionException：，没有'com.java.library.repository.VisitRepositoryImpl‘类型的限定bean :预期至少有一个bean，它可以作为自动选择。依赖性注释：{}

主修班还包括：

@EnableJpaRepositories("com.java.library.repository")
@EntityScan("com.java.library.model")
@ComponentScan("com.java.library.service")
@SpringBootApplication
public class LibraryApplication {

    public static void main(String[] args) {
        SpringApplication.run(LibraryApplication.class, args);
    }

}

有什么问题吗？

Answer 1

尝试将存储库包添加到@ComponentScan配置中

@ComponentScan({"com.java.library.service", "com.java.library.repository"})

Answer 2

尝试在VisitService类中添加@Autowired注释。

@Autowired
private VisitRepositoryImpl repository;